"Stupidity is something unshakable; nothing attacks it without breaking itself against it; it is of the nature of granite, hard and resistant"

In this quote, Gustave Flaubert is highlighting the unyielding and unchangeable nature of stupidity. He compares it to granite, a type of rock understood for its firmness and resistance. Similar to how absolutely nothing can quickly break or alter granite, stupidity can not be easily gotten rid of or changed. Flaubert recommends that any effort to attack or obstacle stupidity will only result in the opponent being broken or beat. This quote acts as a cautionary tip that stupidity is a powerful force that can not be easily conquered, and it is important to approach it with care and understanding instead of attempting to forcefully change it.